No. According to information from the official website of the Food and Health Supervision Bureau, alkaline rice cakes can be stored for twenty days, and can be stored for two months after being soaked in water. Alkaline rice cakes are made from ordinary indica rice pulp and undergo processes such as filtration, fermentation, alkaline water soaking, and cooking. After being processed, the alkaline water cake will expire after one year and will deteriorate. After consumption, it may cause adverse reactions such as acute gastroenteritis and food poisoning, which is harmful to your health.